40023345 has 16 divisors (see below), whose sum is σ = 64916352. Its totient is φ = 21052800.

The previous prime is 40023341. The next prime is 40023353. The reversal of 40023345 is 54332004.

It is a happy number.

It is not a de Polignac number, because 40023345 - 2² = 40023341 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40023341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17181 + ... + 19370.

It is an arithmetic number, because the mean of its divisors is an integer number (4057272).

Almost surely, 2^40023345 is an apocalyptic number.

It is an amenable number.

40023345 is a deficient number, since it is larger than the sum of its proper divisors (24893007).

40023345 is a wasteful number, since it uses less digits than its factorization.

40023345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36632.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 40023345 is about 6326.4006354324. The cubic root of 40023345 is about 342.0617087104.

Adding to 40023345 its reverse (54332004), we get a palindrome (94355349).

The spelling of 40023345 in words is "forty million, twenty-three thousand, three hundred forty-five".